#todolist{
    width: 100%;
    height: 100%;
}
.header{
    width: 700px;
    height: 75px;
    margin: 0  auto;
    background-color: black;
}
.logo{
    width: 30px;
    height: 50px;
    float: left;
    color: #ccc;
    font-size: 24px;
    font-weight: bold;
    padding: 20px 0px 0px 10px;
}
.header input{
    width: 200px;
    height: 25px;
    float: left;
    background-color: #fefefe;
    margin-left: 100px;
    margin-top: 20px;
    border-radius: 8px 8px;
    padding-left: 8px;
    padding-top: 4px;
}
#search{
    height: 25px;
    margin-left: 50px;
}
.sou{

    height: 30px;
    width: 50px;
    margin-left: 5px;
    margin-top: 22px;
}
.active{
    background-color: teal;
    color: thistle;
}
.edit{
    width: 40px;
    height: 23px;
    font-size: 10px;
    text-align: center;
    float: right;
    background-color: wheat;
    border: none;
}
.content{
    width: 700px;
    height: 450px;
    margin: 0 auto;
    background-color: #cdcdcd;
    overflow: hidden;
}
.undone{
    width: 700px;
    height: 230px;
}
.page{
    width: 18px;
    border:1px solid #000;
    text-align: center;margin-right: 6px;
}
.done{
    width: 700px;
    height: 220px;
}
h2{
    display: block;
    font-size: 24px;
    margin-left: 12px;
    font-weight: bold;
}
span{
    display: inline-block;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    text-align: center;
    background-color: #fefefe;
    margin-left: 400px;
}
ol,ul{
    width: 600px;
}
ol>li{
    width: 500px;
    background-color: #fefefe;
    margin-bottom: 4px;
    border-left: 4px solid green;
    border-radius: 3px;
}
ul>li{
    width: 500px;
    background-color: #fefefe;
    margin-bottom: 4px;
    border-left: 4px solid green;
    border-radius: 3px;
}
.mask{
    width: 100%;
    height: 525px;
    position: absolute;
    left:0px;
    top: 0px;
    z-index: 1;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
}
.dialog{
    width: 300px;
    height: 200px;
    background-color: #fff;

}
.change{
    margin-bottom:20px;
}
.del{
    border-radius: 50%;
    border: none;
    float: right;
    margin-right: 10px;
    margin-top: 3px;
    background-color: slategrey;
}